California Family Law - Can a quit claim be used to take a husband off the deeds of the houses?

With an impending divorce, the wife wants to take the husband's name off the two properties they both own, so that he cannot claim it as an et. (Understanding that liability for the loan is a different issue.) What happens if he does sign it? Will it hold in a court of law? The wife doesn't want the husband's future wife or stepchildren to have any part of the proceeds.